Corkscrew



FIG. 1 is a rear side perspective view of a corkscrew according to thepresent design;

FIG. 2 is a front elevational view of the corkscrew of FIG. 1;

FIG. 3 is a rear elevational view of the corkscrew of FIG. 1;

FIG. 4 is a side elevational view of the corkscrew of FIG. 1; and,

FIG. 5 is a top view of the corkscrew of FIG. 1.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

I claim the ornamental design for a corkscrew, as shown and described.